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Originally Posted by Lang Kamara The correct one is 'understanding' because the word 'to' following 'critical' is a preposition and should be followed by a gerund, the 'ing' form of a verb. |
Very insightful.
Prepositional phrases don't require a subject, [1], whereas verbs, [2], even infinitives, [3], do.
[1] thus critical
to(wards) understanding
[2] thus critical that
we understand
[3] thus critical in order for
us to understand